Method for acquiring intraocular optical energy of a patient's eye and optical treatment device

Abstract

This application discloses a method and an optical therapy device for obtaining the incoming light energy of a patient's eye during irradiation by an optical therapy device. The method includes: obtaining a light spot energy distribution map of the treatment spot formed by the optical therapy device on the patient's eye at a current working distance, the light spot energy distribution map including multiple energy distribution regions, each energy distribution region having a corresponding regional energy value; obtaining an image of the patient's pupil and obtaining a corresponding pupil distribution map, the pupil distribution map having multiple pupil distribution regions; performing a weighted calculation on the regional energy values ​​of the energy distribution regions that are mapped to each other within overlapping regions and the pupil distribution values ​​of the pupil distribution regions to obtain a baseline value of incoming light energy corresponding to a preset duration; and obtaining the incoming light energy value of the patient during irradiation by the optical therapy device based on the baseline value of incoming light energy corresponding to the preset duration and the actual irradiation time parameter.

Description

Technical Field

[0001] This invention relates to the field of ophthalmic treatment, and more particularly to a method and optical treatment device for acquiring light energy entering a patient's eye. Background Technology

[0002] Light energy sources (such as LEDs, lasers, or broadband light sources) have been widely used in ophthalmic treatment and vision care. By precisely controlling the output wavelength range (e.g., 400-650nm) of light radiation, specific doses, frequencies, and irradiation times are applied to ocular tissues (such as the retina, cornea, or lens) to achieve therapeutic interventions for eye diseases such as dry eye, myopia control, and macular degeneration, or to relieve visual fatigue. In practical applications, when light energy sources are used to treat ophthalmic diseases, the amount of light energy applied to the patient's eyes is usually strictly controlled. If too little light energy is applied, the expected therapeutic effect is often difficult to achieve; if too much light energy is applied, it may cause irreversible damage to the patient's eyes.

[0003] Based on the above problems, there is an urgent need to propose a solution that can realize the statistical analysis of light energy entering the eye. Summary of the Invention

[0004] This application provides a method and an optical therapy device for statistically analyzing light energy entering the eye, thereby solving the problem of statistical analysis of light energy entering the eye.

[0005] In one aspect of this application, a method is provided for acquiring the energy of light entering a patient's eye during irradiation by an optical therapy device. The method comprises: acquiring an energy distribution map of a therapeutic spot formed by the optical therapy device on the patient's eye at a current working distance; the energy distribution map includes multiple energy distribution regions, each energy distribution region having a corresponding regional energy value, wherein the regional energy value characterizes the energy value of the therapeutic spot within the corresponding energy distribution region over a preset time period; the current working distance is the distance between the light outlet of the optical therapy device and the patient's pupil; acquiring an image of the patient's pupil, and acquiring a phase image based on the pupil image. A corresponding pupil distribution map is generated, which has multiple pupil distribution regions. The pupil distribution map and the light spot energy distribution map are aligned in the same ocular spatial coordinate system to establish a spatial mapping relationship between the corresponding distribution regions of the pupil distribution map and the light spot energy distribution map within the overlapping area. Based on the spatial mapping relationship, the regional energy values ​​of the mutually mapped energy distribution regions within the overlapping area are weighted and calculated with the pupil distribution values ​​of the pupil distribution regions to obtain the reference value of incoming light energy corresponding to the preset duration. Based on the reference value of incoming light energy corresponding to the preset duration and the actual irradiation time parameter, the incoming light energy value of the patient during the irradiation of the optical therapy device is obtained.

[0006] In another aspect of this application, a method for forming a spot energy distribution map of an optical therapy device is provided, characterized in that the method includes: acquiring multiple original spot images formed by the optical therapy device irradiating a predetermined receiving surface within a preset time period at multiple preset working distances; acquiring grayscale distribution information of multiple image regions corresponding to each original spot image; normalizing the grayscale distribution information to generate a spot weight distribution map corresponding one-to-one with each of the image regions; wherein the weight value corresponding to each image region is: the ratio of the grayscale value of the image region to the sum of the grayscale values ​​of all image regions in the original spot image; and obtaining a spot energy distribution map corresponding to each working distance based on the total energy value of the therapeutic spot within the preset time period and the spot weight distribution map; wherein the regional energy value in each spot energy distribution map is determined by the product of the corresponding weight value and the total energy value within the preset time period.

[0007] In another aspect of this application, a method is provided for obtaining the incoming light energy during irradiation of a patient's eye by an optical therapy device. The method comprises: acquiring a light spot energy distribution map of a treatment spot formed by the optical therapy device on the patient's eye at a current working distance; the light spot energy distribution map including multiple energy distribution regions, each energy distribution region having a corresponding region energy value, wherein the region energy value characterizes the energy value of the treatment spot within the corresponding energy distribution region within a preset time period, and the current working distance is the distance between the light outlet of the optical therapy device and the patient's pupil; acquiring an image of the patient's pupil and obtaining a corresponding pupil binary mask image based on the acquired pupil image, wherein the pupil binary mask image and the light spot energy distribution map have the same pixel resolution; performing pixel-by-pixel multiplication and summation on the light spot energy distribution map and the pupil binary mask image to obtain a reference value of incoming light energy corresponding to the preset time period; and obtaining the incoming light energy value during the patient's irradiation by the optical therapy device based on the reference value of incoming light energy corresponding to the preset time period and the actual irradiation time parameter.

[0008] In another aspect of this application, an optical therapy device is provided, characterized in that it includes: a light outlet for emitting a therapeutic light spot towards a patient's eye; a memory for storing a computer program; and a processor, communicatively connected to the memory and configured to perform the following operations: acquiring a light spot energy distribution map of the therapeutic light spot formed by the optical therapy device at the patient's eye at a current working distance, the light spot energy distribution map including multiple energy distribution regions, each energy distribution region having a corresponding region energy value, wherein the region energy value is used to characterize the energy value of the therapeutic light spot within the corresponding energy distribution region within a preset time period, the current working distance being the distance between the light outlet of the optical therapy device and the patient's pupil; acquiring the patient's pupil... The image of the pupil is obtained, and a corresponding pupil distribution map is acquired based on the image of the pupil, the pupil distribution map having multiple pupil distribution regions; the pupil distribution map and the light spot energy distribution map are aligned in the same ocular spatial coordinate system, so that a spatial mapping relationship is established between the corresponding distribution regions of the pupil distribution map and the light spot energy distribution map in the overlapping area; and based on the spatial mapping relationship, the regional energy values ​​of the energy distribution regions that are mapped to each other in the overlapping area are weighted and calculated with the pupil distribution values ​​of the pupil distribution regions to obtain the reference value of incoming light energy corresponding to the preset duration; based on the reference value of incoming light energy corresponding to the preset duration and the actual irradiation time parameter, the incoming light energy value of the patient during the irradiation of the optical therapy device is obtained. Attached Figure Description

[0009] The above and other features of this application will become more fully clear through the following description and appended claims, in conjunction with the accompanying drawings. It is understood that these drawings depict only a few embodiments of the application and should not be construed as limiting the scope of the application. The application will be described more clearly and in more detail through the use of the drawings.

[0010] Figure 1 This is a flowchart illustrating a method for counting light energy entering the eye according to an embodiment of this application; Figure 2 This is a schematic diagram showing the therapeutic light emitted from the light outlet of an optical therapy device projected onto a background plate at different working distances according to an embodiment of this application; Figure 3 This is a schematic diagram of a spot energy distribution map provided according to an embodiment of this application; Figure 4 This is a schematic diagram of a pupil binary image provided according to an embodiment of this application; Figure 5 This is a schematic diagram of obtaining the light energy distribution map entering the eye by multiplying the light spot energy distribution map and the pupil binary map according to an embodiment of this application; Figure 6 This is a schematic diagram of an optical therapy device according to an embodiment of this application; Figure 7 This is a simplified flowchart illustrating a method for statistically analyzing light energy entering the eye, according to one embodiment of this application. Detailed Implementation

[0011] In the following detailed description, reference is made to the accompanying drawings, which form a part thereof. In the drawings, similar symbols generally denote similar components unless the context otherwise requires. The illustrative embodiments described in the detailed description, drawings, and claims are not intended to be limiting. Other embodiments and variations may be employed without departing from the spirit or scope of the subject matter of this application. It will be understood that various different configurations, substitutions, combinations, and designs can be made to the various aspects of the general description and illustrated in the drawings of this application, all of which explicitly form part of the subject matter of this application.

[0012] refer to Figures 1 to 5 According to one aspect of the embodiments of this application, a method is provided for obtaining the light energy entering the eye of a patient during irradiation by an optical therapy device. In clinical practice, not only do differences in facial structure among different patients lead to inconsistent initial distances, but also during actual treatment, involuntary eye movements, head micro-movements, and other unforeseen dynamic situations can cause changes in the actual distance (i.e., working distance) between the light outlet 11 of the optical therapy device and the pupil, and also cause real-time shifts in the relative spatial position of the light spot and the pupil.

[0013] To overcome the energy calculation bias caused by the aforementioned complexities, this application's method comprehensively considers multiple dimensions, including "distance change" and "pupil movement." On one hand, by acquiring a light spot energy distribution map matching the current working distance, the impact of distance changes on the energy entering the eye is captured in a timely manner. On the other hand, the pupil distribution map is acquired in real time and spatially aligned with the light spot energy distribution map in the same coordinate system, thereby accurately capturing and adapting to the constantly changing overlapping area between the light spot and the pupil. Through this, this application can achieve rapid and accurate calculation of the actual light energy entering the eye, dynamically and adaptively quantifying the instantaneous effective light radiation. This not only provides precise real-time energy monitoring and closed-loop control for optical therapy but also allows for effective evaluation of the treatment status throughout the entire treatment cycle. Furthermore, the precise light energy value obtained by this method can be directly used as a key input parameter for subsequent control systems, providing real-time energy monitoring and closed-loop control for the optical therapy equipment. This not only helps ensure the expected treatment effect but can also trigger corresponding safety protection mechanisms, effectively avoiding the risk of eye damage due to excessive irradiation and significantly improving the overall safety of the surgery.

[0014] Figure 1 This is a flowchart illustrating a method for statistically analyzing light energy entering the eye according to an embodiment of this application, as shown below. Figure 1 As shown, the process of this method may include the following steps S101-S104: Step S101, constructing multiple spot energy distribution maps a (e.g., Figure 3 As shown in the diagram, the multiple light spot energy distribution maps a are used to characterize the regional energy distribution of the therapeutic light 12 emitted by the optical therapy device at multiple different working distances, corresponding to preset durations. The working distance is the distance between the light outlet 11 of the optical therapy device and the patient's pupil. In some embodiments, the therapeutic light 12 emitted by the optical therapy device can be used to treat patients' eye diseases, such as cataracts and myopia. It should be particularly noted that... Figure 1 The method exemplarily includes step S101 of "constructing" multiple spot energy distribution maps a, primarily to disclose the data source and physical meaning of the distribution maps in greater detail. The method of this application does not necessarily require the optical therapy device to actively perform this "construction" step. In actual clinical applications, the spot energy distribution map a can be pre-calibrated and stored in the optical therapy device's memory (or external storage medium) before leaving the factory. When executing the method of this application, the system only needs to directly "obtain" (e.g., read or call) the pre-defined distribution map corresponding to the working distance to proceed with subsequent steps.

[0015] In clinical practice, this method effectively addresses various problems in existing technologies by generating multiple light energy distribution maps corresponding to different working distances. For example, due to individual physiological differences in eyeball protrusion, eyelid structure, etc., the actual distance between the pupil and the light output port 11 of the device is difficult to maintain perfectly. This method aims to overcome the challenge posed by patient variability and adapt to the treatment needs of different patients.

[0016] In one specific embodiment of this application, the preset duration is set to a unit time (1 second). In this case, based on the physical relationship between energy and power, when the preset duration is a unit time, the spot energy distribution map is numerically equivalent to the power distribution of the spot. Furthermore, the spot energy distribution map characterizes the energy distribution of the therapeutic spot in a spatial distribution form. The regional energy value of each energy distribution area is essentially the cumulative result of the light intensity (irradiance) of that area at the corresponding spatial coordinates over the preset duration and the area of ​​that area. Therefore, the term "spot energy distribution map" in this application should be interpreted broadly, encompassing any form of image, picture, or digital matrix that uses energy, power, or light intensity as the original physical quantity and displays its spatial distribution.

[0017] In another preferred embodiment, the preset duration is set to the single-frame exposure time of the image acquisition device. Since the grayscale brightness of the pixels acquired by the image acquisition device naturally reflects the photon energy accumulated during the exposure time, the distribution map obtained through image processing is the single-frame energy map. In this embodiment, the reference value of the incoming light energy represents the single-frame incoming light energy. When calculating the total energy, the actual illumination time parameter can be specifically represented as the number of effectively illuminated image frames. By accumulating the reference value of the incoming light energy corresponding to each effective frame, the total illumination energy can be obtained.

[0018] In some embodiments, constructing multiple light spot energy distribution maps a includes the following steps S1–S4: Step S1: Acquire light spot images at different working distances. Using the straight-line distance from the light output port 11 of the optical therapy device to the predetermined receiving surface 13 (e.g., a completely black background) as the working distance, the treatment light 12 is projected onto the predetermined receiving surface 13. Then, the optical therapy device is precisely controlled to move along the optical axis (e.g., continuous, equally spaced displacement), and a light spot image projected onto the predetermined receiving surface 13 at each preset position, corresponding to a preset time period, is acquired to obtain multiple light spot images. In some embodiments, the optical therapy device can be kept stationary, and the treatment light 12 can be projected onto the predetermined receiving surface 13. Then, the predetermined receiving surface 13 is precisely controlled to move along the optical axis, and a corresponding light spot image is acquired at each preset position to obtain the desired multiple light spot images. In this process, the preset time period can be specifically represented at the hardware level as the exposure time of the image acquisition device.

[0019] In some embodiments, such as Figure 2 As shown, three representative working distances—40mm, 50mm (set as the standard working distance), and 60mm—can be selected for spot image acquisition. Among the three acquired spot images, when deviating from the standard working distance (i.e., when the working distance is adjusted to 40mm or 60mm), the captured spot image areas are approximately equal; while at the standard working distance (50mm), the spot area is the smallest, exhibiting obvious focusing characteristics. It is understood that the specific values ​​above are only examples; in practical applications, more numbers or different spacings of working distances can be selected according to the specific optical path design of the optical therapy device.

[0020] Step S2, image grayscale processing. For each acquired light spot image, the grayscale distribution information of its corresponding multiple image regions (e.g., pixels or regions) is obtained. Since the original light spot image corresponds to the accumulation within a preset time period, its grayscale value distribution information physically characterizes the energy accumulation intensity distribution of the light spot at that spatial location. Through grayscale processing, the interference of color information is eliminated, thereby extracting brightness data that purely reflects the light intensity accumulation characteristics.

[0021] Step S3, Normalization Processing. Normalization is performed on each grayscale image after the above processing. The ratio of the grayscale value of each image region to the sum of the grayscale values ​​of all image regions in the grayscale image of the spot image is calculated to generate a spot weight distribution map corresponding to each image region. This ratio is the weight value corresponding to that image region (e.g., a pixel), ensuring that the sum of the weight values ​​of all regions is 1. This weight value represents the relative energy intensity distribution ratio of the spot at that spatial location at that working distance.

[0022] Step S4: Generate a spot energy distribution map a. Based on the total energy value of the treatment light 12 within the aforementioned preset duration, multiplied by the weight value in the spot weight map, the spot energy distribution map a corresponding to each working distance can be obtained. In some embodiments, the total energy value can be calculated by measuring the real-time power value of the treatment light with an optical power meter and multiplying it by the preset duration, or by directly measuring it with an energy meter. Specifically, the regional energy value of each energy distribution area in the spot energy distribution map a is determined by the product of the corresponding weight value and the total energy value. This regional energy value characterizes the energy value of the treatment spot within the corresponding energy distribution area within the preset duration.

[0023] Step S102: Acquire the current patient's eye image and the current working distance. At the start of treatment, an image acquisition device is used to acquire the current patient's eye image, and a distance sensor is used to acquire the current working distance, i.e., the real-time distance from the light outlet 11 of the optical treatment device to the patient's pupil. It should be further clarified that the "eye image" acquired in the above steps refers to the original image containing the patient's pupil obtained by the image acquisition device. It is particularly important to note that the "image of the patient's pupil" or "pupil image" mentioned in this application refers to an eye image containing the pupil region (i.e., in addition to the pupil, the image may also include other eye tissues or parts such as the iris, sclera, or eyelids), and not narrowly refers to an image containing only the pupil region itself. After acquiring the image containing the pupil, the system then uses an image processing algorithm to segment the pupil region to generate a corresponding pupil distribution map.

[0024] Step S103: Perform image processing on the acquired current patient eye image, segment the pupil region, and generate a binary pupil image b (e.g., ...). Figure 4 (as shown); and based on the current working distance, a target light spot energy distribution map a corresponding to the current working distance is selected from multiple light spot energy distribution maps a. It should be noted that the pupil binary map b in this embodiment is a preferred specific implementation of the "pupil distribution map" described in this application. Specifically, each pixel (or pixel block) in the pupil binary map b corresponds to the "pupil distribution area", and the binarized value of the pixel corresponds to the "pupil distribution value", wherein the distribution value located within the pupil area is a first preset value of 1, and the distribution value located outside the pupil area is a second preset value of 0. It can be understood that in order to achieve accurate pixel-by-pixel calculation, through preprocessing methods such as image resampling or cropping, the pupil binary mask map (i.e., pupil binary map b) and the target light spot energy distribution map a can have the same pixel resolution in the processing matrix.

[0025] Specifically, based on the acquired current patient eye image, the pupil region is segmented using an image segmentation algorithm (such as threshold segmentation, edge detection, etc.), and a binary pupil image b of the same size as the eye image is generated. In this binary pupil image b, the pixel value within the pupil region is set to 1, and the pixel value outside the pupil region is set to 0. Simultaneously, based on the acquired current working distance, a matching (e.g., the closest) spot energy distribution image a is selected from multiple spot energy distribution images a as the target spot energy distribution image a. In some embodiments, if the current working distance is between the preset working distances of two calibrated spot energy distribution images, a target spot energy distribution image a precisely corresponding to the current working distance can be calculated based on the spot energy distribution images corresponding to these two distances using an interpolation algorithm (e.g., linear interpolation algorithm), thereby further improving the accuracy of the light energy calculation for the incoming light. In still other embodiments, the optical treatment device pre-stores a mapping function model of spot energy distribution changing with distance. After obtaining the current working distance, the optical therapy device directly substitutes the distance value as an independent variable into the mapping function model, and generates a target spot energy distribution map in real time through analytical calculation.

[0026] Step S104: Based on the pupil binary image b and the target light spot energy distribution map a, obtain the total effective incoming light energy within the preset treatment cycle.

[0027] In some embodiments, if the preset duration is set to a unit time (e.g., 1 second), the method for obtaining the total effective incoming light energy within a preset treatment cycle based on the pupil binary map b and the target light spot energy distribution map a includes the following steps one to three: Step 1: Establish spatial mapping and perform weighted calculation. First, align the pupil binary image b (pupil distribution map) and the target spot energy distribution map a in the same ocular spatial coordinate system. Specifically, this can be achieved by pre-calibrating the spatial positional relationship between the image acquisition device and the light output port of the optical treatment device, unifying their coordinates to the same coordinate system, so that a spatial mapping relationship is established between the corresponding distribution areas of the pupil binary image b and the target spot energy distribution map a within the overlapping area. Subsequently, based on the spatial mapping relationship, the values ​​mapped to each other in the overlapping area of ​​the pupil binary image b and the target spot energy distribution map a are weighted and calculated (e.g., multiplied element-wise) to obtain the incoming light energy distribution map c (since it is obtained based on the spot energy distribution map per unit time, this distribution map essentially represents the spatial distribution of incoming light power within that unit time).

[0028] Step two: Accumulate the element values ​​in the incident light energy distribution map c to obtain the incident light energy reference value ΔP. Figure 5For example, the baseline value of incoming light energy ΔP is the sum of all the values ​​in the incoming light energy distribution map c, i.e., ΔP = 10*30 + 10*20 + 6*10 = 560. Based on the physical relationship that energy is equivalent to power per unit time, the baseline value of incoming light energy ΔP reflects the total optical power contributed by the light spot in the pupil area per unit time. By summing the values ​​in the incoming light energy distribution map c, the total amount of light energy entering the eye per unit time can be quantified.

[0029] Step 3: Obtain the total effective incoming light energy within the preset treatment cycle based on the baseline incoming light energy value. This specifically includes the following steps A–D: Step A: Define effective irradiation conditions. The effective irradiation conditions for the light spot projected by the treatment light 12 onto the patient's pupil can be set according to requirements. For example, it can be set as follows: the offset between the center of the light spot projected onto the patient's pupil and the center of the patient's pupil is less than a preset threshold, and / or the ratio of the area of ​​the overlapping region of the treatment light spot and the pupil to the total area of ​​the pupil is greater than a preset ratio threshold (e.g., 80%). This ensures that most of the energy of the light spot actually enters the pupil.

[0030] Step B: Determine the effective time segment Δt. Within a preset treatment cycle, periodically determine whether the current light spot meets the effective irradiation conditions at a preset calculation cycle. The total duration corresponding to N calculation cycles that meet the effective irradiation conditions is defined as the effective time segment Δt. The calculation cycle can be any set time period. In some embodiments, the calculation cycle is the single-frame exposure time of the image acquisition device. In other embodiments, the calculation cycle includes not only the single-frame exposure time of the image acquisition device but also the subsequent data transmission time and the processing time of the optical therapy device in performing algorithms such as pupil recognition and effective irradiation condition determination.

[0031] Step C: Calculate the single-shot light energy entering the eye. Assuming the incoming light power remains stable within a set effective time segment Δt, since the baseline value ΔP represents the incoming light energy per unit time, the single-shot light energy value corresponding to the effective time segment Δt can be obtained by directly calculating the product of the effective time segment Δt and the baseline value ΔP.

[0032] Step D: Calculate the total effective incoming light energy. By summing the single incoming light energy values ​​corresponding to all effective time segments Δt within the preset treatment cycle, the total effective incoming light energy actually entering the patient's eye within the preset treatment cycle can be obtained. By statistically analyzing the total effective incoming light energy, precise closed-loop control of the incoming light energy can be achieved while also preventing eye damage to the patient.

[0033] In some embodiments, the single-time light energy calculation in step C can be omitted. Instead, step B can be performed directly throughout the entire treatment cycle to obtain the total effective time segment Δt of the entire treatment cycle. Similarly, based on the above equivalent relationship of energy per unit time, the product of the total effective duration and the baseline value of light energy entering the eye ΔP can be directly calculated to obtain the total effective light energy actually entering the patient's eye within the preset treatment cycle in one go.

[0034] In other embodiments, if the preset duration is set to a non-unit time (e.g., the single-frame acquisition time of an image acquisition device, such as 10 milliseconds), the method for obtaining the total effective incoming light energy within a preset treatment cycle based on the pupil binary image b and the target light spot energy distribution map a includes the following steps one to three: Step 1: Establish a spatial mapping and perform weighted calculations. Similarly, unify the pupil binary image b and the target light spot energy distribution image a into the same spatial coordinate system to establish a mapping relationship, and perform weighted calculations (e.g., element-wise multiplication) on the values ​​in the overlapping areas to obtain the light energy distribution image c entering the eye. Here, since it is acquired based on a single frame acquisition time, this distribution image essentially directly represents the actual spatial distribution of light energy entering the human eye within that single frame acquisition time.

[0035] Step two: Accumulate the element values ​​in the incident light energy distribution map c to obtain the incident light energy reference value ΔP. Figure 5 For example, adding all the values ​​in the energy distribution map c of the eye provides ΔP. ​​Under this setting, the baseline value of the incoming light energy ΔP directly reflects the amount of incoming light energy contributed by the light spot within the pupil region in a single frame during the single frame acquisition time.

[0036] Step 3: Obtain the total effective incoming light energy within the preset treatment cycle based on the baseline value ΔP of the incoming light energy. This specifically includes the following steps A–D: Step A: Define effective irradiation conditions. (This is the same as in the previous embodiment, ensuring energy enters the pupil through center offset or overlap ratio thresholds, which will not be repeated here).

[0037] Step B: Determine the effective time segment Δt. This can be done similarly to the previous embodiments, where the total duration corresponding to N calculation cycles that meet the effective illumination conditions is considered the effective time segment Δt. In some embodiments, if the preset duration is set to the single-frame acquisition time of the image acquisition device, such as 10 milliseconds, it can also be determined whether N consecutive single-frame calculation cycles meet the effective illumination conditions. If they do, the total duration of these N consecutive single frames is considered the effective time segment Δt.

[0038] Step C: Calculate the light energy entering the eye in a single burst. Assuming the light energy remains stable within the set effective time segment Δt, divide the effective time segment Δt by the preset duration t.preset Then multiply by the reference value of incoming light energy ΔP to obtain the single incoming light energy value corresponding to the effective time segment Δt. The specific calculation formula is as follows: Single burst of light energy entering the eye = ΔP × Δt / t preset (t) preset (For preset duration) In some embodiments, if the preset duration is set to the single-frame acquisition time of the image acquisition device, the reference value ΔP of the incoming light energy in the eye (which represents the incoming light energy value in the single-frame acquisition time) of N consecutive single-frame acquisition cycles within the effective time segment Δt can be summed to obtain the single incoming light energy value.

[0039] Step D: Calculate the total effective incoming light energy. Accumulate the single incoming light energy values ​​corresponding to all effective time segments Δt within the preset treatment cycle to obtain the total effective incoming light energy actually entering the patient's eye.

[0040] In some embodiments, the total output energy of the therapeutic light 12 within the total effective time T can be calculated by recording each effective time segment Δt and accumulating the total effective time T=∑Δt, thereby calculating the percentage of the total effective light energy entering the eye to the total output energy within the total effective time T.

[0041] Furthermore, in other embodiments, instead of limiting to N consecutive calculation cycles, statistics and accumulation can be performed directly based on a single calculation cycle. Specifically, all calculation cycles within the treatment cycle that meet the effective irradiation conditions are counted, and the times of these effective calculation cycles are added together to determine the total effective irradiation duration; simultaneously, at least one reference value of incoming light energy is obtained within each calculation cycle that meets the effective irradiation conditions; finally, based on the reference value of incoming light energy in each calculation cycle that meets the effective irradiation conditions and its corresponding calculation cycle duration, a time accumulation calculation is performed to obtain the total incoming light energy value within the treatment cycle. According to another aspect of the embodiments of this application, an optical therapy device for implementing the above-described method for counting incoming light energy is also provided, such as... Figure 6 As shown. The optical therapy device mainly includes: a memory 21, a light source device 22, a distance sensor 23, an image acquisition device 24, and a processor 25.

[0042] Memory 21 is used to store data and programs. It contains pre-stored energy distribution maps of multiple light spots (e.g., ...). Figure 3 As shown, multiple spot energy distribution maps a correspond to the light energy distribution at different working distances. The construction of multiple spot energy distribution maps a can be carried out in the same way as steps S1-S4 above, and will not be repeated here.

[0043] The light source device 22 is configured to generate therapeutic light 12 (reference). Figure 2 In some embodiments, the therapeutic light 12 can be used to generate light for treating ophthalmic diseases such as cataracts and myopia.

[0044] The distance sensor 23 is used to acquire the current working distance between the light outlet 11 of the device's light source 22 and the patient's pupil in real time. It can be a laser ranging module or an ultrasonic sensor, etc.

[0045] Image acquisition unit 24 is used to acquire real-time images of the patient's eyes. It is typically an infrared-sensitive camera and may be equipped with an infrared illuminator to provide clear imaging in low-light conditions without irritating the patient.

[0046] The processor 25 is connected to the memory 21, the distance sensor 23, and the image acquisition unit 24, respectively. The processor 25 is configured to perform the following operations: acquire the current working distance measured by the distance sensor 23, and based on the current working distance, acquire the corresponding light spot energy distribution map a at the working distance from a plurality of light spot energy distribution maps a pre-stored in the memory 21; acquire the patient's pupil image acquired by the image acquisition unit 24, and generate a corresponding pupil distribution map (i.e., a binary pupil map b) based on the pupil image; align the pupil distribution map and the light spot energy distribution map a in the same ocular spatial coordinate system so that the corresponding distribution areas of the two in the overlapping area establish a spatial mapping relationship; based on the spatial mapping relationship, perform a weighted calculation on the energy values ​​of the mutually mapped areas in the overlapping area and the pupil distribution values ​​to obtain the reference value of the light energy entering the eye corresponding to the preset duration; and further calculate the total effective light energy entering the eye within the preset treatment cycle based on the irradiation duration. The specific implementation methods of the above processing steps have been described in detail in the foregoing method embodiments, and will not be repeated here.

[0047] According to another aspect of the embodiments of this application, a simplified method for calculating the energy of light entering the eye is also provided. In some treatment scenarios, the optical path design of the treatment light makes the energy distribution of the spot small at different working distances (e.g., parallel light), or the optical treatment device is designed to always be used at a fixed standard working distance. In this case, the calculation process can be simplified. Figure 7 This is a simplified flowchart illustrating a method for statistically analyzing light energy entering the eye, according to an embodiment of this application. Figure 7 As shown, the method includes the following steps: Step 301: Construct a light spot energy distribution map a at a standard working distance (e.g., 50 mm). The light spot energy distribution map a is used to characterize the optical therapy device at its light outlet 11 (reference). Figure 2The energy distribution of the emitted therapeutic light at the standard working distance. The construction method of the spot energy distribution map a is roughly the same as that of steps S1–S4 above, except that only one spot energy distribution map a at the standard distance needs to be constructed. It should be noted that, since the spot energy distribution does not change much with distance or the physical working distance is fixed in this specific scenario, the pre-constructed spot energy distribution map a at the standard working distance serves as the spot energy distribution map at the "current working distance" of the patient's eye as described in this application. Similarly, this construction step (i.e., the generation process of the spot energy distribution map) can be performed by the optical therapy device itself, or it can be pre-constructed by other external calibration devices (such as a factory calibration platform), and the constructed spot energy distribution map can be pre-stored in the memory of the optical therapy device or provided to the optical therapy device through a data interface.

[0048] Step 302: Acquire images of the patient's eyes, segment the pupils through image processing, and generate a binary pupil image b based on the pupil segmentation results.

[0049] Step 303: Based on the pupil binary image b and the light spot energy distribution map a, obtain the total effective incoming light energy within the preset treatment cycle. Specifically, refer to the methods described in steps one to three of the above embodiments, which will not be repeated here.

[0050] This embodiment provides a simplified method for statistically analyzing light energy entering the eye. While ensuring accurate energy statistics on the relative position of the light spot and the pupil, this method omits the construction and real-time matching process of light spot energy distribution maps a at various working distances. It is suitable for devices with specific designs or usage scenarios, reducing the complexity of the system.

[0051] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for acquiring the light energy entering a patient's eye during irradiation by an optical therapy device, characterized in that, The method includes: The energy distribution map of the treatment spot formed by the optical therapy device in the patient's eye at the current working distance is obtained. The energy distribution map includes multiple energy distribution regions, each of which has a corresponding regional energy value. The regional energy value is used to characterize the energy value of the treatment spot in the corresponding energy distribution region within a preset time period. The current working distance is the distance between the light outlet of the optical therapy device and the patient's pupil. An image of the patient's pupil is acquired, and a corresponding pupil distribution map is obtained based on the pupil image, wherein the pupil distribution map has multiple pupil distribution regions; Align the pupil distribution map and the light spot energy distribution map in the same ocular spatial coordinate system to establish a spatial mapping relationship between the corresponding distribution areas of the pupil distribution map and the light spot energy distribution map within the overlapping area; and Based on the spatial mapping relationship, the regional energy value of the energy distribution area that is mapped to each other in the overlapping area is weighted and calculated with the pupil distribution value of the pupil distribution area to obtain the reference value of incoming light energy corresponding to the preset duration. Based on the baseline value of incoming light energy corresponding to the preset duration and the actual irradiation time parameters, the incoming light energy value of the patient during the period of receiving irradiation by the optical therapy device is obtained.

2. The method according to claim 1, characterized in that, The preset duration is a unit time, the single-frame acquisition time of the light spot energy distribution map, or the single-frame acquisition time of the pupil image.

3. The method according to claim 1, characterized in that, The step of acquiring the energy distribution map of the therapeutic spot formed by the optical therapy device in the patient's eye at the current working distance includes: Obtain the current working distance; and Based on the current working distance, obtain the light spot energy distribution map corresponding to the current working distance.

4. The method according to claim 1, characterized in that, The step of weighting the energy values ​​of the energy distribution areas that are mapped to each other within the overlapping areas and the pupil distribution values ​​of the pupil distribution areas to obtain the reference value of incoming light energy corresponding to the preset duration, based on the spatial mapping relationship, includes: Calculate the sum of the products of the pupil distribution value of each pupil distribution region mapped to each other within the overlapping region and the regional energy value of the corresponding energy distribution region, and use the sum as the reference value of the incoming light energy.

5. The method according to claim 1, characterized in that, The pupil distribution map is a binary mask image, wherein the pupil distribution value of the pupil distribution area located within the pupil area is a first preset value, and the pupil distribution value of the pupil distribution area located outside the pupil area is a second preset value.

6. The method according to claim 1, characterized in that, The method further includes: Within a preset treatment cycle, the treatment spot is periodically determined to meet preset effective irradiation conditions using a preset calculation cycle. The actual irradiation time parameter is obtained by summing all calculation cycles that meet the effective irradiation conditions within the treatment cycle; and Based on the actual irradiation time parameter and the reference value of the light energy entering the eye corresponding to the preset duration, the light energy value entering the eye within the treatment cycle is obtained.

7. The method according to claim 6, characterized in that, The step of obtaining the incoming light energy value within the treatment cycle based on the reference value of the incoming light energy corresponding to the actual irradiation time parameter and the preset duration includes: Obtain the reference value of incoming light energy corresponding to the preset duration within each calculation cycle that satisfies the effective irradiation conditions; and The light energy reference value entering the eye corresponding to the preset duration of each calculation cycle that meets the effective irradiation conditions is accumulated over time to obtain the light energy value entering the eye within the treatment cycle.

8. The method according to claim 6, characterized in that, The effective irradiation conditions include at least one of the following: The offset between the center of the treatment spot and the center of the patient's pupil is less than a preset threshold; and The ratio of the area of ​​the overlapping region between the treatment spot and the pupil to the total area of ​​the pupil is greater than a preset ratio threshold.

9. A method for forming a light spot energy distribution map for an optical therapy device, characterized in that, The method includes: At multiple preset working distances, acquire multiple original light spot images formed by the optical therapy device irradiating a predetermined receiving surface within a preset time period; For each of the original light spot images, obtain the grayscale distribution information of its corresponding multiple image regions; The grayscale distribution information is normalized to generate a spot weight distribution map corresponding one-to-one with each of the image regions; wherein, the weight value corresponding to each image region is: the ratio of the grayscale value of that image region to the sum of the grayscale values ​​of all image regions in the original spot image; and Based on the total energy value of the treatment spot for the preset duration and the spot weight distribution map, a spot energy distribution map corresponding to each working distance is obtained; wherein, the regional energy value in each spot energy distribution map is determined by the product of the corresponding weight value and the total energy value for the preset duration.

10. A method for acquiring the light energy entering a patient's eye during irradiation by an optical therapy device, characterized in that, The method includes: The energy distribution map of the treatment spot formed by the optical therapy device in the patient's eye at the current working distance is obtained. The energy distribution map includes multiple energy distribution regions, each of which has a corresponding regional energy value. The regional energy value is used to characterize the energy value of the treatment spot in the corresponding energy distribution region within a preset time period. The current working distance is the distance between the light outlet of the optical therapy device and the patient's pupil. Images of the patient's pupils are acquired, and a corresponding binary pupil mask is obtained based on the acquired pupil images, wherein the binary pupil mask has the same pixel resolution as the light spot energy distribution map; The light spot energy distribution map and the pupil binary mask map are multiplied pixel by pixel and then summed to obtain the reference value of incoming light energy corresponding to the preset duration. Based on the baseline value of incoming light energy corresponding to the preset duration and the actual irradiation time parameters, the incoming light energy value of the patient during the irradiation of the optical therapy device is obtained.

11. The method according to claim 10, characterized in that, The preset duration is a unit time, the single-frame acquisition time of the light spot energy distribution map, or the single-frame acquisition time of the pupil image.

12. An optical therapy device, characterized in that, include: The light outlet is used to project a therapeutic light spot into the patient's eyes; Memory, used to store computer programs; as well as The processor, which is communicatively connected to the memory, is configured to perform the following operations: The energy distribution map of the treatment spot formed by the optical therapy device in the patient's eye at the current working distance is obtained. The energy distribution map includes multiple energy distribution regions, each of which has a corresponding regional energy value. The regional energy value is used to characterize the energy value of the treatment spot in the corresponding energy distribution region within a preset time period. The current working distance is the distance between the light outlet of the optical therapy device and the patient's pupil. An image of the patient's pupil is acquired, and a corresponding pupil distribution map is obtained based on the pupil image, wherein the pupil distribution map has multiple pupil distribution regions; Align the pupil distribution map and the light spot energy distribution map in the same ocular spatial coordinate system to establish a spatial mapping relationship between the corresponding distribution areas of the pupil distribution map and the light spot energy distribution map within the overlapping area; and Based on the spatial mapping relationship, the regional energy value of the energy distribution area that is mapped to each other in the overlapping area is weighted and calculated with the pupil distribution value of the pupil distribution area to obtain the reference value of incoming light energy corresponding to the preset duration. Based on the baseline value of incoming light energy corresponding to the preset duration and the actual irradiation time parameters, the incoming light energy value of the patient during the period of receiving irradiation by the optical therapy device is obtained.

13. The optical therapy device according to claim 12, characterized in that, The preset duration is a unit time, the single-frame acquisition time of the light spot energy distribution map, or the single-frame acquisition time of the pupil image.

14. The optical therapy device according to claim 12, characterized in that, The optical therapy device further includes a distance measurement component for acquiring the distance between the light outlet of the optical therapy device and the patient's pupil, and the processor is further configured to perform the following steps: Obtain the current working distance; and Based on the current working distance, obtain the light spot energy distribution map corresponding to the current working distance.

15. The optical therapy device according to claim 12, characterized in that, The step of weighting the energy values ​​of the energy distribution areas that are mapped to each other within the overlapping areas and the pupil distribution values ​​of the pupil distribution areas to obtain the reference value of incoming light energy corresponding to the preset duration, based on the spatial mapping relationship, includes: Calculate the sum of the products of the pupil distribution value of each pupil distribution region mapped to each other within the overlapping region and the regional energy value of the corresponding energy distribution region, and use the sum as the reference value of the incoming light energy.

16. The optical therapy device according to claim 12, characterized in that, The pupil distribution map is a binary mask image, wherein the pupil distribution value of the pupil distribution area located within the pupil area is a first preset value, and the pupil distribution value of the pupil distribution area located outside the pupil area is a second preset value.

17. The optical therapy device according to claim 12, characterized in that, The processor is further configured to perform the following operations: Within a preset treatment cycle, the treatment spot is periodically determined to meet preset effective irradiation conditions using a preset calculation cycle. The calculation cycles that meet the effective irradiation conditions within the treatment cycle are statistically analyzed to determine the actual irradiation time parameters; as well as Based on the actual irradiation time parameter and the reference value of the light energy entering the eye corresponding to the preset duration, the light energy value entering the eye within the treatment cycle is obtained.

18. The optical therapy device according to claim 17, characterized in that, The process of obtaining the incoming light energy value during the treatment cycle includes: Obtain the reference value of incoming light energy corresponding to the preset duration within each calculation cycle that satisfies the effective irradiation conditions; and The light energy reference value entering the eye for each calculation cycle that meets the effective irradiation conditions is accumulated over time with the corresponding calculation cycle duration to obtain the light energy value entering the eye within the treatment cycle.

19. The optical therapy device according to claim 18, characterized in that, The effective irradiation conditions include at least one of the following: The offset between the center of the treatment spot and the center of the patient's pupil is less than a preset threshold; and The ratio of the area of ​​the overlapping region between the treatment spot and the pupil to the total area of ​​the pupil is greater than a preset ratio threshold.

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